Yes, you can run Windows 10.
Yes, you can run Windows 10.
Your device should correctly identify networking and audio drivers, avoiding the need to rely on Windows 7 drivers for that component.
The presence of drivers could be irrelevant due to the motherboard's age, or compatible drivers from component makers might remain available.
It's hard to predict since OEM boards rarely receive updates for upcoming Windows versions. A machine running a Core 2 Quad is probably from Windows Vista or earlier. It's unlikely Acer would provide drivers for a device that old. My IdeaPad was shipped with Windows 8, but even that lacks drivers for Windows 10. Including drivers in the OS isn't a guarantee, especially basic ones like Ethernet or display support.
I meant the firms that design the chipsets such as Intel, Realtek and similar companies would most likely provide compatible drivers even if brands like Acer or any OEM maker skips driver support for older systems (and in certain situations, legacy Windows drivers can still function with Windows 10)